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  • Best approach to design a service oriented system

    - by Gustavo Paulillo
    Thinking about service orientation, our team are involved on new application designs. We consist in a group of 4 developers and a manager (that knows something about programming and distributed systems). Each one, having own opinion on service design. It consists in a distributed system: a user interface (web app) accessing the services in a dedicated server (inside the firewall), to obtain the business logic operations. So we got 2 main approachs that I list above : Modular services Having many modules, each one consisting of a service (WCF). Example: namespaces SystemX.DebtService, SystemX.CreditService, SystemX.SimulatorService Unique service All the business logic is centralized in a unique service. Example: SystemX.OperationService. The web app calls the same service for all operations. In your opinion, whats the best? Or having another approach is better for this scenario?

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  • Having problem reaching client which don't have static ip address

    - by user317311
    i am making a messenger over internet. it has a server which listens to clients but when it try to send the reply to any request to client it shows the error of client not found. however my clients are connecting to that server because it has a static ip address and live server. having problem reaching client because they can be behind any firewall or network and dont have static ip addresses. so how can i reach to my client?? any Suggestions..

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  • how to retain one million of simultanous TCP connections?

    - by cow
    i am to design a server that needs to serve millions of clients that are simultaneously connected with the server via TCP. the data traffic between the server and the clients may be sparse. so bandwidth issue can be ignored. one important requirement is that whenever the server needs to send data to any client it can use the existing TCP connection instead of opening a new connection toward the client (because client can be behind a firewall). does anybody know how to do it and what hardware/software is needed (at the least cost)? thanks in advance for any suggestion.

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  • Sending data to a web site over HTTP

    - by sfactor
    i have a program that receives data from a wireless device over bluetooth...i now need to do some operations in the data and then send it to the website (web server!!!) as a .csv file...i also need to authenticate the device itself from it hardware address which is also obtained in the program.i am coding this in gcc linux compiler using C...can anyone tell me how do i go about doing this?

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  • Mac OSX Programming for long time Linux geek

    - by DarenW
    I've written software on Linux since 1995 but must get up to speed with app development on the Mac. I have no experience on that platform. Obviously I should get my hands on some appropriate hardware. What are good books, tutorial websites, and other resources for experienced devs getting started on Mac? Not just APIs and app internals, but also including how does one install an app, debug it, etc?

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  • Use one Socket to send and recieve data

    - by volody
    What makes more sense? use one socket to send and receive data to/from a embedded hardware device use one socket to send data and separate socket to read data Communication is not very intensive but the important point is to receive data as fast as possible. On application side is used Windows XP and up.

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  • Trigger local program execution from browser

    - by DroidIn.net
    First and foremost: I know it's not right or even good thing to do but my current customer will not cave in. So here's what he is asking for (this is for in-house-behind-a-firewall-etc project). In the web report I need to supply a link which points to the executable script that lives on the universally mapped location (network file server). When user clicks on it it is expected to run on the local client starting local executable which should be pre-installed on the client's box. It should be agnostic to OS (Windows or Linux) and the browser used. Customer doesn't mind to click on angry pop-up alerts but he wants to do it once per client browser (or at minimum - session). QUESTION: Will trusted Java applet be able to do it? Or is the any other (better, simpler) ways of achieving the same? ActiveX control is out of question

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  • Why does a port occasionally stop listening? This happens only on occasion

    - by Binh Nguyen
    I have a Windows Service written in C# that listens on port 8591. I also have a web application hosted in IIS on the same server that makes request to the service. On occasion the port will stop listening and throws the following error: "No connection could be made because the target machine actively refused it 127.0.0.1:8591". This happened 3 times in 2 months and just resolves itself. I can also fix it manually by restarting the service. I'm wondering if any one else has run into this problem and has possible suggestions to resolve. I'm a developer and have worked with our windows group extensively and they assure me there is no firewall or AV blocking the port on occasion. This is running on Windows Server 2008 R2. Very puzzled at what could be causing this to happen. Please let me know if you need more information.

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  • Internet Access in Ubuntu on VirtualBox

    - by Joel Martinez
    I recently installed Ubuntu on a VirtualBox VM ... it installed just fine (much easier than on VirtualPC). However, I'm unable to get internet access from the guest OS (ie. Ubuntu). Can anyone give me any pointers on how I might enable this? The Host OS is Windows Vista, and the hardware is an IBM Lenovo. Thanks! :-)

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  • How to wrap Plone authentication around a third-party servlet?

    - by smocking
    We're using Plone to serve up some third-party middle-ware. Unfortunately the middle-ware has a particular servlet that gets invoked from a Java applet and doesn't do any kind of authentication. I would like to firewall this off and somehow wrap authentication around it, preferably using the existing session that users will have on Plone. My first idea was to configure nginx (which we're using as the reverse proxy) to check the cookie and only proxy if the user has a valid session (along the lines of this example). However, how to check the session ID against Plone, since it's all stored in the Zope database? Alternatively we could have a Plone python script that basically passes everything along to the back-end after authenticating, but I'm not sure how to do that. Any suggestions? Or alternative ideas?

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  • Using OpenGL Without X-Window System

    - by user366250
    Hell every body , i am newbie in linux programming ( Not Windows ) . i want to know how i can using OpenGL on Linux Platform Without X-Window System , can i send OpenGL Graphics Directly to Framebuffer Device ?! There Is Project Named DirectFB ( Direct FrameBuffer ) . with DirectFB We can do this but DirectFB needs for driver for each hardware and i want to user a graphic card that only have linux driver . what is your suggestion to Me . Thanku.

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  • WCF: connecting to service over internet times out

    - by Shaul
    Still on the WCF learning curve: I've set up a self-hosted WCF Service (WSDualHttpBinding), which works fine on my own computer, which resides behind a firewall. If I run the client on my own computer, everything works great. Now I installed the client on a computer outside my network, and I'm trying to access the service via a dynamic DNS, like so: http://mydomain.dyndns.org:8000/MyService. My port forwarding issues were taken care of in a previous question; I can now see the service is up in my browser. But now when I try to run the client on the other machine, I get the following error message: "The open operation did not complete within the allotted timeout of 00:01:00. The time allotted to this operation may have been a portion of a longer timeout." I have disabled security on the service, so that's not it. What else might be preventing the connection from happening?

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  • Secure web service works in Firefox but not in IE7

    - by tridium
    I am trying to call a C# web service from one data center to another. I am able to load the web service properly in Firefox 3.6.3 but it does not load at all in Internet Explorer 7. When I try to install the application which relies on this web service, it can't find the web service at all, just like IE7. Is there any setting or configuration that would allow one browser to load it properly but not the other? I suspect that there's no firewall or that sort of problem because the web service loads for at least one browser.

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  • Creating a Virtual Webcam Device for OS X

    - by andsve
    I am looking for a solution to create a "virtual" webcam device under OS X (that acts just as a normal hardware webcam, but the application has full control over what to output). I'm fairly experienced with C++, but not so much with Objective-C and OSX/Cocoa programming. Anyone that can point me in the right direction, where to look and what I should be looking for? I've searched, but most of the results seems to focus on Windows and DirectX. Thanks!

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  • Is it reasonable to use OpenGL for desktop applications?

    - by JamesK89
    I've been writing a small desktop gadget-type application that displays scrolling text along the bottom of the screen (Similar to the old CNN news ticker), however the performance of GDI is just unsatisfactory (As high as 8-12% on a quad core and 20% on a single core) even after I've attempted to clean out bottlenecks. I was considering using OpenGL instead to render everything, but I don't know if that is a reasonable option to require users to have hardware acceleration for a tiny app like this. Does anybody have any input on this?

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  • Does the size of monitor Matters ?

    - by Arsheep
    I have a old computer , i want to buy a big LCD now the best i can found is Viewsonic's 24" lcd TFT monitor . So will it run without any problems or i need to upgrade the video cards or something too ? The computer is not that much old it has P4 bord and celeron processor with 128 graphics memory . And in properties it shows i can maximum use 1280 x 1024 resolution. I am noob hardware wise So need help on this stuff. Thanks

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  • Use OpenGL ES to create an iPhone painting tool?

    - by Jeff
    Is it feasible to use OpenGL ES to create an iPhone raster graphics editor like SketchBook Mobile(http://usa.autodesk.com/adsk/servlet/pc/item?siteID=123112&id=13872203)? Any related reference(tutorial, sample) you can recommend? Why I try to use OpenGL ES? Because it's hardware accelerated and cross-platform. Thanks in advance!

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